Thomas G. Kahn (SEG) reports 893,227 shares (6.98%) in Schedule 13G

Rhea-AI Filing Summary

Seaport Entertainment Group Inc. Schedule 13G shows that Thomas G. Kahn (Kahn Brothers Group Inc.) reports beneficial ownership of 893,227 shares of Common Stock, representing 6.98% of the class as of 05/08/2026. The filing lists sole voting and dispositive power for the same 893,227 shares.

Key Figures

Beneficial ownership: 893,227 shares Percent of class: 6.98% Sole voting power: 893,227 shares +1 more

4 metrics

Beneficial ownership 893,227 shares Item 4(a) beneficially owned

Percent of class 6.98% Item 4(b) percent of class

Sole voting power 893,227 shares Item 4(c)(i) sole power to vote

Filing date 05/08/2026 Signature date on Schedule 13G

Key Terms

Schedule 13G, Beneficially owned, Sole dispositive power

3 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: Seaport Entertainment Group Inc."

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficially owned regulatory

"Item 4. (a) Amount beneficially owned: 893,227"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole dispositive power regulatory

"Item 4. (c)(iii) Sole power to dispose: 893,227"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/08/2026 - 12:35 PM Learn about SEC filing dates

FAQ

Who filed the Schedule 13G for Seaport Entertainment Group Inc. (SEG)?

The filing was made by Thomas G. Kahn (Kahn Brothers Group Inc.). It identifies his address at 555 Madison Avenue, Suite 1303, New York, NY, and lists citizenship as USA.

How many Seaport Entertainment shares does Thomas G. Kahn report owning?

Thomas G. Kahn reports beneficial ownership of 893,227 shares of Common Stock. The filing states this figure under the ownership section and in the voting/dispositive power lines.

What percentage of Seaport Entertainment does the 893,227 shares represent?

The filing reports that 893,227 shares represent 6.98% of the class. This percent is shown in Item 4(b) of the Schedule 13G excerpt.

Does the filer have voting or dispositive authority over the shares?

Yes. The filing lists sole voting power of 893,227 shares and sole dispositive power of 893,227 shares, with no shared powers reported.

What is the effective date of the ownership reported in the Schedule 13G?

The Schedule 13G is signed and dated 05/08/2026 by Thomas G. Kahn, which serves as the time anchor for the reported ownership figures.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Seaport Entertainment Group Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

812215200

(CUSIP Number)

05/08/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 812215200

1

Names of Reporting Persons

KAHN BROTHERS GROUP INC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 893,227.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 893,227.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

893,227.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Seaport Entertainment Group Inc.
(b)	Address of issuer's principal executive offices: THE SEAPORT, 199 WATER STREET, 28TH FLOOR, NEW YORK, NEW YORK, 10038
Item 2.
(a)	Name of person filing: THOMAS G. KAHN
(b)	Address or principal business office or, if none, residence: 555 MADISON AVENUE SUITE 1303 NEW YORK, NY 10022
(c)	Citizenship: USA
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 812215200
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 893,227
(b)	Percent of class: 6.98 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 893,227
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 893,227
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

KAHN BROTHERS GROUP INC

Signature:	Thomas G. Kahn
Name/Title:	President
Date:	05/08/2026